Minority carrier lifetime detection system

Abstract

The utility model relates to the technical field of minority carrier lifetime detection, in particular to a minority carrier lifetime detection system which comprises a detection platform, a grabbing device, a feeding and discharging device and a control end. The feeding and discharging device comprises a feeding mechanism and a discharging mechanism, the feeding mechanism is arranged on one side of the detection platform, the discharging mechanism is arranged on the side, away from the feeding mechanism, of the detection platform, and the feeding mechanism and the discharging mechanism are in transmission connection; the grabbing device is arranged between the feeding mechanism and the discharging mechanism and used for taking and placing the battery pieces to be detected on the detection platform. The control end is electrically connected with the detection platform and the grabbing device. According to the utility model, the condition of minority carrier lifetime can be conveniently compared through the data recorded by the control end, and the influence on the detection result is reduced due to omission of the metal passivation process, so that the judgment can be intuitively carried out, and the state of the light injection process can be timely known.

Description

Technical Field

[0001] The utility model relates to the technical field of minority carrier lifetime detection, in particular to a minority carrier lifetime detection system. Background Art

[0002] The minority carrier lifetime is one of the important parameters of semiconductor materials and devices, which directly reflects the quality of materials and the characteristics of devices. For solar cells, the shorter the minority carrier lifetime, the faster the loss and recombination of photocarriers. Therefore, the shorter the minority carrier lifetime, the lower the efficiency of the solar cell, thereby reducing the stability of the solar cell.

[0003] At present, minority carrier lifetime monitoring usually only monitors minority carriers after passivation. Since the principle of minority carrier lifetime detection is to collect photocarriers after the test sample is illuminated, the number of photocarriers causes the conductivity of the test piece to change, and thus the conductivity data determines the minority carrier lifetime. However, directly testing samples with metal will affect the conductivity, so directly detecting the minority carrier lifetime after passivation will affect the test results. Utility Model Content

[0004] (I) The utility model provides a minority carrier lifetime detection system, which alleviates the technical problem in the prior art of detecting the minority carrier lifetime after passivation and affecting the detection result.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a minority carrier lifetime detection system for detecting the minority carrier lifetime after light injection of a cell, including a detection platform, a gripping device, a loading and unloading device and a control terminal;

[0007] The loading and unloading device comprises a loading mechanism and a unloading mechanism, wherein the loading mechanism is arranged on one side of the detection platform, and the unloading mechanism is arranged on a side of the detection platform away from the loading mechanism, and the loading mechanism and the unloading mechanism are transmission-connected;

[0008] The grabbing device is disposed between the loading mechanism and the unloading mechanism, and is used to pick up and place the battery cell to be tested on the testing platform;

[0009] The control end is electrically connected to the detection platform and the grasping device respectively.

[0010] Furthermore, the detection platform is provided with a sensor, which is arranged inside the detection platform and is used to detect the position of the battery cell and is electrically connected to the control end.

[0011] Furthermore, the detection platform is also provided with a light source and a connecting rod, one end of the connecting rod is connected to the detection platform, and the light source is installed at the other end of the connecting rod.

[0012] Furthermore, the grabbing device includes a grabbing assembly and a mounting frame, the mounting frame is arranged on a fixed surface on one side of the detection platform, and the grabbing assembly can be rotatably mounted on the mounting frame.

[0013] Furthermore, the grabbing assembly includes at least one automatic suction cup and a rotating rod, the rotating rod is arranged on the mounting frame, the automatic suction cup is installed at the end of the rotating rod, and the rotating rod is electrically connected to the control end.

[0014] Furthermore, the loading and unloading device also includes a guide rail and a cargo box. The loading mechanism and the unloading mechanism are connected by a guide rail transmission. The cargo box is arranged on the guide rail and can move along the extension direction of the guide rail.

[0015] Furthermore, the detection platform is also provided with a power supply component and a battery, the power supply component and the battery are both arranged inside the detection platform, and the power supply component and the battery are electrically connected.

[0016] Furthermore, the power supply component includes a transmitter and a receiver, and the transmitter and the receiver are signal-connected to provide electrical energy to the battery.

[0017] Furthermore, the transmitter is provided with a transmitting coil, the receiver is provided with an induction coil, and the transmitting coil and the induction coil are signal-connected.

[0018] Furthermore, the control terminal is provided with a display screen.

[0019] Beneficial effects of the utility model: the utility model provides a minority carrier lifetime detection system, which is used to detect the minority carrier lifetime of a battery cell after light injection, including a detection platform, a gripping device, a loading and unloading device and a control end. The loading mechanism and the unloading mechanism are connected by a transmission. The semi-finished battery cell after coating is sampled and placed on the loading and unloading device after sintering and light injection processes, and is transported by the loading mechanism and the unloading mechanism. The gripping device is used to grab the cell from the loading mechanism and place it on the detection platform for detection. The detection platform records the data obtained from the detection in the control end. After the detection is completed, the cell is removed from the detection platform again by the gripping device and placed in the unloading mechanism for collection. The data recorded by the control end can be easily compared with the minority carrier lifetime. Since the metal passivation process is omitted, the impact on the detection result is reduced, so that an intuitive judgment can be made and the status of the light injection process can be understood in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the overall structure of a minority carrier lifetime detection system provided in an embodiment of the utility model.

[0022] Icon: 100-detection platform; 200-loading mechanism; 300-unloading mechanism; 400-control terminal; 500-light source; 600-connecting rod. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0026] like Figure 1As shown, the utility model provides a minority carrier lifetime detection system for detecting the minority carrier lifetime after light injection of a battery cell, comprising a detection platform 100, a gripping device, a loading and unloading device and a control end 400; the loading and unloading device comprises a loading mechanism 200 and a unloading mechanism 300, the loading mechanism 200 is arranged on one side of the detection platform 100, and the unloading mechanism 300 is arranged on the side of the detection platform 100 away from the loading mechanism 200, and the loading mechanism 200 and the unloading mechanism 300 are transmission-connected; the gripping device is arranged between the loading mechanism 200 and the unloading mechanism 300, and is used to pick up and place the battery cell to be detected on the detection platform 100; the control end 400 is electrically connected to the detection platform 100 and the gripping device, respectively.

[0027] In this embodiment, the detection system includes a detection platform 100, a gripping device, a loading and unloading device and a control end 400. The loading mechanism 200 and the unloading mechanism 300 are connected by transmission. The semi-finished battery cells after coating are sampled and placed on the loading and unloading device after sintering and light injection processes. They are transported by the loading mechanism 200 and the unloading mechanism 300, and are grabbed from the loading mechanism 200 by a gripping device and placed on the detection platform 100 for detection. The detection platform 100 records the data obtained by the detection in the control end 400. After the detection is completed, the gripping device is used to remove it from the detection platform 100 and place it in the unloading mechanism 300 for collection. The data recorded by the detection platform 100 can facilitate the comparison of the minority carrier lifetime. Since the metal passivation process is omitted, the impact on the detection result is reduced, so that an intuitive judgment can be made and the status of the light injection process can be understood in time.

[0028] Preferably, the detection platform 100 is also provided with a slide, and the slide is used to place the sample to be detected.

[0029] According to an embodiment provided by the present invention, the detection platform 100 is provided with a sensor, which is arranged inside the detection platform 100 and is used to detect the position of the battery cell and is electrically connected to the control terminal 400 .

[0030] In this embodiment, a sensor is installed inside the detection platform 100. When a grasping device is used to grasp the sample to be detected from the loading mechanism 200 and place it on the detection platform 100, the sensor senses that there is a sample on the detection platform 100, generates a signal and transmits it to the control end 400. The control end 400 controls the monitoring platform to start detection.

[0031] Among them, preferably, the sensing line uses an infrared sensor, which can have a high sensitivity, can quickly respond to changes in the target object, and can effectively improve the efficiency of detection. Other types of sensors can also be selected, which will not be elaborated here.

[0032] According to an embodiment provided by the utility model, Figure 1 As shown, the detection platform 100 is further provided with a light source 500 and a connecting rod 600 , one end of the connecting rod 600 is connected to the detection platform 100 , and the light source 500 is installed at the other end of the connecting rod 600 .

[0033] In this embodiment, a connecting rod 600 is installed on the detection platform 100, and a light source 500 is installed on the end of the connecting rod 600 away from the detection platform 100. When the sensor senses that a sample is placed on the detection platform 100, a signal is generated and transmitted to the control end 400. The control end 400 controls the monitoring platform to turn on the light source 500 and start detection.

[0034] According to an embodiment provided by the present utility model, the grabbing device includes a grabbing assembly and a mounting frame. The mounting frame is arranged on a fixed surface on one side of the detection platform 100, and the grabbing assembly can be rotatably mounted on the mounting frame.

[0035] In this embodiment, the mounting frame is installed on a fixed surface on one side of the detection platform 100, and the grabbing assembly is rotatably installed on the mounting frame. Since the detection platform 100 is arranged between the loading mechanism 200 and the unloading mechanism 300, placing the grabbing device on one side of the detection platform 100 can facilitate the taking and placing of samples, thereby reducing the risk of damaging the samples.

[0036] According to an embodiment provided by the utility model, the grabbing assembly includes at least one automatic suction cup and a rotating rod, the rotating rod is arranged on the mounting frame, the automatic suction cup is installed at the end of the rotating rod, and the rotating rod is electrically connected to the control end 400.

[0037] In this embodiment, the grabbing assembly includes at least one automatic suction cup and a rotating rod, wherein, in this embodiment, the number of the automatic suction cups is set to two, which are respectively installed at the two ends of the rotating rod, which can ensure the efficiency of taking and placing the sample. The rotating rod is electrically connected to the control end 400, and the control end 400 can be used to control the rotating rod to rotate to the grabbing position, and the automatic suction cup is used for grabbing. The whole process is automated and does not require human intervention, which can effectively avoid the risk of affecting the detection effect due to damage to the sample.

[0038] According to an embodiment provided by the utility model, Figure 1 As shown, the loading and unloading device also includes a guide rail and a loading box. The loading mechanism 200 and the unloading mechanism 300 are connected by the guide rail transmission. The loading box is arranged on the guide rail and can move along the extension direction of the guide rail.

[0039] In this embodiment, the loading mechanism 200 and the unloading mechanism 300 are connected by a guide rail transmission, and the semi-finished battery cells after coating are sampled and placed in a carrier box after sintering and light injection processes. The carrier box is placed on the guide rail and can be moved along the extension direction of the guide rail for transmission, and then the samples are taken and placed on the detection platform 100 for detection by using the loading and unloading devices arranged along the way.

[0040] According to an embodiment provided by the utility model, Figure 1 As shown, the detection platform 100 is also provided with a power supply component and a battery. The power supply component and the battery are both arranged inside the detection platform 100, and the power supply component and the battery are electrically connected.

[0041] In this embodiment, the detection platform 100 is also provided with a power supply component and a battery. The power supply component and the battery are both arranged inside the detection platform 100. The power supply component and the battery are electrically connected. The power supply component is used to replenish the power required for the detection platform 100 itself to perform detection, which can reduce the detection cost and save resources.

[0042] According to an embodiment provided by the utility model, the power supply component includes a transmitter and a receiver, and the transmitter and the receiver are signal-connected to provide power to the battery.

[0043] Furthermore, a transmitting coil is provided on the transmitter, and an induction coil is provided on the receiver, and the transmitting coil and the induction coil are signal-connected.

[0044] In this embodiment, after the control end 400 controls the light source 500 to turn on, the transmitter generates an alternating current, and an alternating magnetic field is generated through the transmitter's transmitting coil. The induction coil in the receiver senses the alternating magnetic field generated by the transmitter, thereby generating an induced current. Then, the rectifier circuit of the receiver converts the induced current into direct current and sends it to the battery for storage. The battery supplies the stored energy to the detection platform 100 for use during the detection process, which can reduce the detection cost and achieve energy-saving and environmental protection effects.

[0045] During the entire working process, the transmitter and the receiver need to maintain a certain distance to ensure the transmission efficiency of the magnetic field. At the same time, the coils of the transmitter and the receiver need to have a certain degree of matching to achieve the maximum energy transmission efficiency. This practical device adopts the principle of electromagnetic resonance, which can achieve higher energy transmission efficiency and improve the effect of wireless charging.

[0046] According to an embodiment provided by the utility model, Figure 1 As shown, the control terminal 400 is provided with a display screen.

[0047] In this embodiment, the control terminal 400 is also provided with a display screen, and the data recorded by the control terminal 400 can be intuitively compared on the display screen, so that an intuitive judgment can be made and the status of the light injection process can be understood in time.

[0048] Optionally, the display screen may be a touch screen, and various components in the detection system may be controlled by touching the display screen. Various components in the detection system may also be controlled by setting buttons, which is not limited here.

[0049] Among them, preferably, the control end 400 is selected as a computer, which can be a tablet computer, a laptop computer or a desktop computer, and other easy-to-control electronic products such as mobile phones, bracelets or handbooks can also be selected. The purpose does not deviate from the design concept of the utility model and should belong to the protection scope of the utility model.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A minority carrier lifetime detection system for detecting the minority carrier lifetime after light injection into a cell, characterized in that: It comprises a detection platform (100), a grasping device, a loading and unloading device and a control terminal (400); The loading and unloading device comprises a loading mechanism (200) and a unloading mechanism (300), wherein the loading mechanism (200) is arranged on one side of the detection platform (100), and the unloading mechanism (300) is arranged on a side of the detection platform (100) away from the loading mechanism (200), and the loading mechanism (200) and the unloading mechanism (300) are transmission-connected; The grabbing device is arranged between the loading mechanism (200) and the unloading mechanism (300), and is used to pick up and place the battery cell to be tested on the testing platform (100); The control end (400) is electrically connected to the detection platform (100) and the grasping device respectively.

2. A minority carrier lifetime detection system according to claim 1, characterized in that: The detection platform (100) is provided with a sensor, which is arranged inside the detection platform (100) and is used to detect the position of the battery sheet and is electrically connected to the control terminal (400).

3. A minority carrier lifetime detection system according to claim 2, characterized in that: The detection platform (100) is further provided with a light source (500) and a connecting rod (600), one end of the connecting rod (600) is connected to the detection platform (100), and the light source (500) is installed at the other end of the connecting rod (600).

4. The minority carrier lifetime detection system according to claim 1, characterized in that: The grabbing device comprises a grabbing assembly and a mounting frame, wherein the mounting frame is arranged on a fixed surface on one side of the detection platform (100), and the grabbing assembly can be rotatably mounted on the mounting frame.

5. A minority carrier lifetime detection system according to claim 4, characterized in that: The grabbing assembly comprises at least one automatic suction cup and a rotating rod, wherein the rotating rod is arranged on the mounting frame, the automatic suction cup is installed at the end of the rotating rod, and the rotating rod is electrically connected to the control end (400).

6. The minority carrier lifetime detection system according to claim 1, characterized in that: The loading and unloading device further comprises a guide rail and a cargo box, the loading mechanism (200) and the unloading mechanism (300) are connected by means of a guide rail transmission, the cargo box is arranged on the guide rail and can move along the extension direction of the guide rail.

7. The minority carrier lifetime detection system according to claim 1, characterized in that: The detection platform (100) is also provided with a power supply component and a battery. The power supply component and the battery are both arranged inside the detection platform (100), and the power supply component and the battery are electrically connected.

8. The minority carrier lifetime detection system according to claim 7, characterized in that: The power supply component includes a transmitter and a receiver, and the transmitter and the receiver are signal-connected to provide power to the battery.

9. The minority carrier lifetime detection system according to claim 8, characterized in that: The transmitter is provided with a transmitting coil, the receiver is provided with an induction coil, and the transmitting coil is signal-connected with the induction coil.

10. The minority carrier lifetime detection system according to claim 1, characterized in that: The control terminal (400) is provided with a display screen.

Images